I'm giving this a 4/5 stars. The music was great, and it's a gift to posterity by those who finally assembled this footage, but for too many of the acts, we get to see their opening number — which often is more about getting a groove going — and miss out on the rest of their sets. Fortunately, they circled back later and provided additional Stevie Wonder and Family Stone and Staples footage. We only got about 20 seconds of Moms Mabley, but it was a pretty cool 20. The ones at the peak of their powers here are Sly and the Family Stone, which, if I'm correctly recalling, is the only act who also played Woodstock, and Nina Simone. Nina doesn't even get into her sweet spot, opening with a blues song, following with a Sesame Street-ish sing-song type of children's anthem that took it's title from Lorraine Hansberry's To Be Young Gifted and Black, and then reciting a poem, that's not even hers, but she delivers with more flow than a lot of rappers of today can muster. None of that was really her sweet spot, but she makes it so.